15900117 has 32 divisors (see below), whose sum is σ = 23639040. Its totient is φ = 9461760.

The previous prime is 15900113. The next prime is 15900119. The reversal of 15900117 is 71100951.

It is not a de Polignac number, because 15900117 - 2² = 15900113 is a prime.

It is a super-2 number, since 2×15900117² = 505627441227378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15900113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140653 + ... + 140765.

It is an arithmetic number, because the mean of its divisors is an integer number (738720).

Almost surely, 2^15900117 is an apocalyptic number.

15900117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15900117 is a deficient number, since it is larger than the sum of its proper divisors (7738923).

15900117 is a wasteful number, since it uses less digits than its factorization.

15900117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253.

The product of its (nonzero) digits is 315, while the sum is 24.

The square root of 15900117 is about 3987.4950783669. The cubic root of 15900117 is about 251.4587621626.

The spelling of 15900117 in words is "fifteen million, nine hundred thousand, one hundred seventeen".